<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>View Timeline attached to an SVG graphics element</title>
</head>
<style type="text/css">
  @keyframes bg {
    from { background-color: blue; }
    to { background-color: green; }
  }

  #colorize {
    animation: bg steps(2, jump-none) both;
    animation-timeline: view();
    animation-range: contain;
    background-color:  red;
    color:  white;
  }

  .spacer {
    height:  80vh;
  }
</style>
<body>
<div class="spacer"></div>
<div id="content">
  <p>Hello <span id="colorize">world</span></p>
</div>
<div class="spacer"></div>
</body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script>
  promise_test(async t => {
    const scroller = document.scrollingElement;
    const anim = document.getAnimations()[0];
    await anim.ready;
    assert_equals(getComputedStyle(anim.effect.target)
        .backgroundColor, 'rgb(0, 0, 255)');
    scroller.scrollTop =
        scroller.scrollHeight - scroller.clientHeight;
    await waitForNextFrame();
    assert_equals(getComputedStyle(anim.effect.target)
          .backgroundColor, 'rgb(0, 128, 0)');
  }, 'View timeline attached to SVG graphics element');
</script>
</html>
